Instructions are included, but to summarize, Dirty Deeds contains four sets of cards, Getting Dirty, Even Dirtier, Doing the Deed and the Items. The activity cards are separated face down into 3 piles, with the item cards placed face up. The first player draws a card from the Getting Dirty pile, and then picks one of the 8 item cards. The object displayed needs to be incorporated into the activity, and is assigned a point value. Once 50 points have been collected, that player advances to the Even Dirtier Deck, and the process repeats up to 100 points. Only then can the Doing the Deed deck come into play (so to speak).
90 activity cards are included, along with 8 naughty item cards. You may want to have a look at the item deck first to make sure all the items are available before play starts.